1707:The Kingdom of Great Britain was created as a treaty merging England and Scotland took effect.
1786:Mozart's opera "The Marriage of Figaro" premiered in Vienna.
1931:New York's 102-story Empire State Building was dedicated.
1941:The Orson Welles motion picture "Citizen Kane" premiered in New York.
1945:A day after Adolf Hitler took his own life, Admiral Karl Doenitz effectively became sole leader of the Third Reich with the suicide of Hitler's propaganda minister, Josef Goebbels.
1960:The Soviet Union shot down an American U-2 reconnaissance plane over Sverdlovsk and captured its pilot, Francis Gary Powers.
1964:The computer programming language BASIC (Beginner's All-Purpose Symbolic Instruction Code) was created by Dartmouth College professors John G. Kemeny and Thomas E. Kurtz.
1967:Elvis Presley married Priscilla Beaulieu at the Aladdin Hotel in Las Vegas.
1971:The intercity passenger rail service Amtrak went into operation.
1975:Hank Aaron of the Milwaukee Brewers broke baseball's all-time RBI record previously held by Babe Ruth during a game against the Detroit Tigers.
1982:The World's Fair in Knoxville, Tennessee, was opened by President Ronald Reagan.
1992:On the third day of the Los Angeles riots, a visibly shaken Rodney King appeared in public to appeal for calm, pleading, "Can we all get along?"
2011:President Barack Obama announced the death of Osama bin Laden during a U.S. commando operation (because of the time difference, it was early May 2 in Pakistan, where the al-Qaida leader met his end).